TY - JOUR
T1 - The spectroscopically confirmed huge cosmic structure at z = 0.55
AU - Tanaka, M.
AU - Finoguenov, A.
AU - Kodama, T.
AU - Koyama, Y.
AU - Maughan, B.
AU - Nakata, F.
PY - 2009/10/2
Y1 - 2009/10/2
N2 - We report on the spectroscopic confirmation of a huge cosmic structure around the CL0016 cluster at z = 0.55. We made wide-field imaging observations of the surrounding regions of the cluster and identified more than 30 concentrations of red galaxies near the cluster redshift. The follow-up spectroscopic observations of the most prominent part of the structure confirmed 14 systems close to the cluster redshift, roughly half of which have a probability of being bound to the cluster dynamically. We also made an X-ray follow-up, which detected extended X-ray emissions from 70% of the systems in the X-ray surveyed region. The observed structure is among the richest ever observed in the distant Universe. They will be an ideal site for quantifying environmental variations in the galaxy properties and effects of large-scale structure on galaxy evolution.
AB - We report on the spectroscopic confirmation of a huge cosmic structure around the CL0016 cluster at z = 0.55. We made wide-field imaging observations of the surrounding regions of the cluster and identified more than 30 concentrations of red galaxies near the cluster redshift. The follow-up spectroscopic observations of the most prominent part of the structure confirmed 14 systems close to the cluster redshift, roughly half of which have a probability of being bound to the cluster dynamically. We also made an X-ray follow-up, which detected extended X-ray emissions from 70% of the systems in the X-ray surveyed region. The observed structure is among the richest ever observed in the distant Universe. They will be an ideal site for quantifying environmental variations in the galaxy properties and effects of large-scale structure on galaxy evolution.
KW - Galaxies: clusters: individual: CL0016+16
KW - Large-scale structure of Universe
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U2 - 10.1051/0004-6361/200912929
DO - 10.1051/0004-6361/200912929
M3 - Article
AN - SCOPUS:70349961464
SN - 0004-6361
VL - 505
SP - L9-L12
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -